function judgeStrEmpty(str) {
	if(typeof str === "undefined" || str === null || str === ""){
		return true;
	}else{
		return false;
	}
}
function judgeObjEmpty(obj) {
	if(obj === null) {
		return true;
	}
	else {
		let arr = Object.keys(obj)
		if(arr.length > 0) {
			return false;
		}
		else 
			return true;
	}
}
function judgeArrEmpty(arr) {
	if(arr.length > 0) {
		return false;
	}
	else 
		return true; 
}
export { judgeStrEmpty,judgeObjEmpty,judgeArrEmpty }
